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Safety Relief Valve

Safety Relief Valve Model No.: SV-005 (Open Bonnet & Open Cap with Fork-Lever)
Safety Relief Valve Model No.: SV-025 (Close Bonnet & Close Cap)
Safety Relief Valve Model No.: SV-025X (Close Bonnet & Close Cap with Packed Lever)
Safety Relief Valve Model No.: SV-001 (Close Bonnet & Close Cap)

Pressure Relief Valve
Pressure Safety Valve
Full Lift Safety Relief Valve
Angle Type Safety Relief Valve
Spring Loaded Safety Relief Valve

Dharmi all Safety Relief Valves are designed as per API 526. They also conform to ASME Section VIII. Dimensions of valves meet to API 521/521. Metal seated Safety Valves Testing is carried our as per API 527 for Set Pressure & Leakages.

A Safety Relief Valve is a mechanical, self actuating, pop design, spring loaded angle type valve, which is being used for the automatic release (on a set pressure) of a substance from a Pressure Vessel, Boiler, Overpressure of Pipeline or any Industrial System when the Pressure or Temperature exceeds required limits. Pressure Relief valves also being used to Control the Pressure in an Industrial System, Process Pipeline or Pressure Vessel which can develop by a failure of equipment, instrument or process upset.

Valve Size Orifice Code Orifice Diameter (MM) Dimensions
A B C
25 x 50 D 9.5 105.0 114.5 440
25 x 50 E 12.5 105.0 114.5 440
25 x 50 G 23.0 105.0 114.5 440
40 x 50 F 16.0 124.0 120.5 500
40 x 65 G 23.0 124.0 120.5 500
40 x 80 H 28.0 130.0 124.0 525
40 x 80 J 31.5 130.0 124.0 575
50 x 80 H 28.0 133.0 124.0 525
50 x 80 J 32.5 133.0 124.0 575
50 x 80 K 36.5 133.0 124.0 575
65 x 100 J 32.5 136.0 143.0 600
80 x 100 K 42.5 155.0 162.0 615
80 x 100 L 50.0 155.0 162.0 615
80 x 100 M 56.0 155.0 162.0 615
100 x 150 P 72.5 181.0 229.0 890
100 x 150 Q 95.5 181.0 229.0 890
150 x 200 Q 95.5 240.0 241.0 1150
150 x 200 R 115.0 240.0 241.0 1150
 

Safety Valve also known by the name of Pressure Relief Valve (PRV) and Pressure Safety Valve (PSV). Other names of Safety Valves are Safety Relief Valve, Thermal Relief Valve, Relief Valve, Spring Loaded Safety Valve, Angle Type Safety Valve, Pilot Operated Safety Relief Valve and Low Pressure Safety Relief Valve.

The difference in between Pressure Safety Valve (PSV) and Pressure Relief Valve is Pressure Safety Relief Valve have provided a manual lever with a cap to relieve the pressure in case of emergency.

Mostly two types of protection encountered in Industries which are Flow Protection & Thermal Protection. Flow protection is done by the using of Safety Relief Valves and Thermal Protection by Thermal Relief Valve. 

Specification of Safety Relief Valve

Angle Type, Pop Design, Full Lift, Spring Loaded Safety Valve

Safety Relief Valve Model No.: SV-005 (Open Bonnet & Open Cap with Fork-Lever)
Safety Relief Valve Model No.: SV-025 (Close Bonnet & Close Cap)
Safety Relief Valve Model No.: SV-025X (Close Bonnet & Close Cap with Packed Lever)
Safety Relief Valve Model No.: SV-001 (Close Bonnet & Close Cap)

 

Safety Valve Standards :

Design Standard : API 526/ASME Section VIII

Inspection & Testing Standard : API 527

Dimension Standard : API 520/521

End Connection : Flanged End, Raised Face

Size Range : x to 6 x 8

Pressure Rating : 150# / 300# / 600#

 

Safety Valve Technical Specification :

Design : Full Lift, Spring Loaded

Discharge : Angle Type

Bonnet Type : Open / Close

Cap Type : Close / Fork-Lever / Packed Lever

Material of Construction : Forged Carbon Steel (ASTM A 105)
Cast Carbon Steel (ASTM A 216 GR. WCB)
Low Carbon Steel (ASTM A 352 GR. LCB)
ASTM A 351 GR. CF 8 (S.S. 304)
ASTM A 351 GR. CF 8M (S.S. 316)
ASTM A 351 GR. CF 3 (S.S. 304L)
ASTM A 351 GR. CF 3M (S.S. 316L)

Trim Parts : AISI 304/316/304L/316L (S.S. 304/316/304L/316L)
Stellited Hard Face on Nozzle & Disc

 

Safety Relief Valve Application :

  • Oil & Gas Application
  • Chemical & Petrochemical Plant
  • Boiler & Steam Pipe Line
  • Power Plant
  • Thermal Relief Application
  • Fertilizer Plant
  • Pressure Vessel/Reactor/Tanks
  • Fire Fighting Plant
  • Pressure Reducing System/Station
  • Cryogenic Services

Thermal Relief Valve

Thermal Relief Valve Model No.: TV-011 (Thermal Relief Valve Screwed End)
Thermal Relief Valve Model No.: TV-001 (Thermal Relief Valve Flanged End)

Thermal relief valve is being use to relieve the pressure, which is generated by increasing in the liquid volume caused by an increase in temperature. Thermal relief valve also used at Pipe Line, Pressure Vessel or Tanks to relief a pressure which generated by Thermal Expansion. Dharmi Thermal Relief valves manufacturing range start from (15NB) Size to 2 (50NB) Size.

Gun Metal Thermal Relief Valve
(Safety Relief Valve)
Cast Steel Thermal Relief Valve
(Safety Relief Valve)

 

Specification of Thermal Relief Valve :
Thermal Relief Valve Screwed End Model No.: TV011

Size Range : 15 x 25NB, 20 x 25NB, 25 x 40NB, 40 x 50NB, 50 x 50NB
( x 1, x 1, 1 x 1, 1 x 2, 2 x 2)

Pressure Rating : Set Pressure Up to 100 bar

Material of Construction : Forged Carbon Steel (ASTM A 105)
Cast Carbon Steel (ASTM A 216 GR. WCB)
Low Carbon Steel (ASTM A 352 GR. LCB)
ASTM A 351 GR. CF 8 (S.S. 304)
ASTM A 351 GR. CF 8M (S.S. 316)
ASTM A 351 GR. CF 3 (S.S. 304L)
ASTM A 351 GR. CF 3M (S.S. 316L)

Trim Parts : AISI 304/316/304L/316L (S.S. 304/316/304L/316L)
Stellited Hard Face on Nozzle & Disc

End Connection : Inlet - Male Screwed End / Female Screwed End
Outlet - Female Screwed End

Valve Orifice : 7mm, 9.5mm (D), 10mm, 12mm, 12.5MM (E), 16mm (F)

 
Safety Valve, Exporter, Supplier, Stockiest, Distributor, Safety Valves Manufacturer & Exporter
Safety Relief Valve, Pressure Relief Valve, Thermal Relief Valve, Pressure Safety Valve
Spring Loaded Safety Valve, Full Lift Safety Valve, Angle Type Safety Relief Valve,
Relief Valve, Open Discharge Safety Valve

 

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